If you haven't already, you can also play with the numbers on the interactive charting outcomes data that NRMP put out this year and see where you may fall.
Interactive Charting Outcomes in the Match - The Match, National Resident Matching Program
I'm a DO, and my initial match was one of the last ones of the 2 match system.
1. I unsuccessfully tried to scramble in the DO match and withdrew from the MD match. I chose to take an osteopathic TRI that was connected to an EM program. One of my classmates did the same thing. Several of my friends that didn't match EM this year successfully SOAPed into spots. I also looked into programs that were accredited after the match, Interviewed at one. That's an option as well.
2. Several of us applied again. All of us from my TRI (now TY) that were interested in EM all matched. 4 of the 5 stayed there, I chose to rank someone else #1 and matched at that program. My classmate was a TRI at a different institution matched at their program as well
3. As posted above. don't take the year off. Do a TY, or prelim year, preferably one at an institution that has an EM program. The face time helps, plus you may be able to get updated SLOE's
4. Research doesn't really help. Killer SLOE's and Crushing Step 2 would be better
5. Happened to me, I refused to give up on my dream of EM. I matched at my #1 EM program
6. No good data out there as far as reapplicants go, other than the link I posted above
In an interesting twist, I matched at my #1, which promptly closed 45 days after I started. Transferred to the program I had tried to scramble to when I didn't match the first time.